RWR78S1000FPB12

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Through Hole Resistors

A through hole resistor is an electrical component with two terminals that are connected to its respective ends. This type of resistor is commonly used in electronics when stable, precise resistance is needed. One example of a through-hole resistor is the RWR78S1000FPB12, which is a type of wire-wound resistor used for voltage-current limiting and surge protection.

RWR78S1000FPB12 Application Field

The RWR78S1000FPB12 is most commonly used as a high-wattage, non-inductive resistor for power supply and motor control applications. It is designed to achieve accurate TCR (temperature coefficient of resistance) of less than 0.1% per degree Celsius over its operating temperature range. This makes it ideal for applications such as voltage-current limiting and surge protection in power supply and inverter circuits.

This product is also suitable for other high-power current limiting applications, such as: high-energy switching in power supply and motor control systems, inrush-current limitation, ground fault protection, external voltage compensation of bridge rectifiers, and snubber networks for high-voltage switching.

RWR78S1000FPB12 Working Principle

The working principle of the RWR78S1000FPB12 is based on two key concepts: the principle of electrical conduction and the principle of mechanical resistance. Electrical conduction is the transfer of electricity through a material, while mechanical resistance is the amount of force that must be applied to a material in order to move it. The RWR78S1000FPB12 combines these two concepts to create a device with a specific resistance value that remains stable over a wide range of temperatures.

The RWR78S1000FPB12 is composed of a carbon-based core that is wound with a high temperature-resistant wire. This causes the device to create an electrical resistance that is determined by the number of turns of the wire against the diameter of the core. As the wire continues to heat up, it contracts, increasing the resistance of the device. As the device cools down, the wire expands, which decreases the resistance.

Additionally, the RWR78S1000FPB12 also features an insulated coating with a fire-resistant material. This coating makes it suitable for use in high-temperature environments, which further increases its performance and stability.

Conclusion

The RWR78S1000FPB12 is an ideal choice for applications that require a high-wattage, non-inductive resistor. It is designed with an insulated fire-resistant coating, which allows it to perform well in a wide range of temperatures, and its wire-winding construction provides a stable and accurate resistance. As part of the through-hole resistor family, the RWR78S1000FPB12 provides a reliable and cost-effective solution for current-limiting and surge protection needs.

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